/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.activemq.network;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Iterator;

import org.apache.activemq.broker.BrokerFactory;
import org.apache.activemq.broker.BrokerRegistry;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.BrokerTestSupport;
import org.apache.activemq.broker.StubConnection;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.store.PersistenceAdapter;
import org.apache.activemq.store.memory.MemoryPersistenceAdapter;
import org.apache.activemq.transport.Transport;
import org.apache.activemq.transport.TransportFactory;
import org.apache.activemq.usage.SystemUsage;

public class NetworkTestSupport extends BrokerTestSupport {

   protected ArrayList<StubConnection> connections = new ArrayList<>();

   protected TransportConnector connector;

   protected PersistenceAdapter remotePersistenceAdapter;
   protected BrokerService remoteBroker;
   protected SystemUsage remoteMemoryManager;
   protected TransportConnector remoteConnector;
   protected boolean useJmx = false;

   @Override
   protected void setUp() throws Exception {
      super.setUp();

      remotePersistenceAdapter = createRemotePersistenceAdapter(true);
      remoteBroker = createRemoteBroker(remotePersistenceAdapter);
      remoteConnector = createRemoteConnector();
      remoteBroker.addConnector(remoteConnector);
      BrokerRegistry.getInstance().bind("remotehost", remoteBroker);
      remoteBroker.start();
   }

   @Override
   protected BrokerService createBroker() throws Exception {
      BrokerService broker = BrokerFactory.createBroker(new URI("broker:()/localhost?persistent=false&useJmx=false&"));
      connector = createConnector();
      broker.addConnector(connector);
      broker.setUseJmx(useJmx);
      return broker;
   }

   /**
    * @return
    * @throws Exception
    * @throws IOException
    * @throws URISyntaxException
    */
   protected TransportConnector createRemoteConnector() throws Exception, IOException, URISyntaxException {
      return new TransportConnector(TransportFactory.bind(new URI(getRemoteURI())));
   }

   /**
    * @param value
    * @return
    * @throws Exception
    * @throws IOException
    * @throws URISyntaxException
    */
   protected TransportConnector createConnector() throws Exception, IOException, URISyntaxException {
      return new TransportConnector(TransportFactory.bind(new URI(getLocalURI())));
   }

   protected String getRemoteURI() {
      return "vm://remotehost";
   }

   protected String getLocalURI() {
      return "vm://localhost";
   }

   protected PersistenceAdapter createRemotePersistenceAdapter(boolean clean) throws Exception {
      if (remotePersistenceAdapter == null || clean) {
         remotePersistenceAdapter = new MemoryPersistenceAdapter();
      }
      return remotePersistenceAdapter;
   }

   protected BrokerService createRemoteBroker(PersistenceAdapter persistenceAdapter) throws Exception {
      BrokerService answer = new BrokerService();
      answer.setBrokerName("remote");
      answer.setUseJmx(useJmx);
      answer.setPersistenceAdapter(persistenceAdapter);
      return answer;
   }

   @Override
   protected StubConnection createConnection() throws Exception {
      Transport transport = TransportFactory.connect(connector.getServer().getConnectURI());
      StubConnection connection = new StubConnection(transport);
      connections.add(connection);
      return connection;
   }

   protected StubConnection createRemoteConnection() throws Exception {
      Transport transport = TransportFactory.connect(remoteConnector.getServer().getConnectURI());
      StubConnection connection = new StubConnection(transport);
      connections.add(connection);
      return connection;
   }

   protected Transport createTransport() throws Exception {
      Transport transport = TransportFactory.connect(connector.getServer().getConnectURI());
      return transport;
   }

   protected Transport createRemoteTransport() throws Exception {
      Transport transport = TransportFactory.connect(remoteConnector.getServer().getConnectURI());
      return transport;
   }

   /**
    * Simulates a broker restart. The memory based persistence adapter is
    * reused so that it does not "loose" it's "persistent" messages.
    *
    * @throws Exception
    */
   protected void restartRemoteBroker() throws Exception {

      BrokerRegistry.getInstance().unbind("remotehost");
      remoteConnector.stop();

      remoteBroker.stop();
      remotePersistenceAdapter.stop();
      remotePersistenceAdapter = createRemotePersistenceAdapter(false);
      remotePersistenceAdapter.start();

      remoteBroker = createRemoteBroker(remotePersistenceAdapter);
      remoteBroker.addConnector(getRemoteURI());
      remoteBroker.start();
      BrokerRegistry.getInstance().bind("remotehost", remoteBroker);
   }

   @Override
   protected void tearDown() throws Exception {
      for (Iterator<StubConnection> iter = connections.iterator(); iter.hasNext(); ) {
         StubConnection connection = iter.next();
         connection.stop();
         iter.remove();
      }

      BrokerRegistry.getInstance().unbind("remotehost");
      remoteConnector.stop();
      connector.stop();

      remoteBroker.stop();
      remoteBroker.waitUntilStopped();
      remotePersistenceAdapter.stop();
      super.tearDown();
   }

}
